So I'm an aspiring tech and I would like to know if my method for troubleshooting is correct. I have a co-worker who dropped his laptop while running. He complains that it now hangs when the GUI loads. His disk drive isn't a SSD, so I would assume he caused a head crash on his disk. I'm thinking he now has some bad sectors. My first move would be to boot safe mode, than run CHKDSK with the R switch. Does this sound about right?